WO2011082679A1

WO2011082679A1 - Lens for led street lamp

Info

Publication number: WO2011082679A1
Application number: PCT/CN2011/070067
Authority: WO
Inventors: 李镭
Original assignee: Li Lei
Priority date: 2010-01-08
Filing date: 2011-01-07
Publication date: 2011-07-14
Also published as: CN101737712A

Abstract

A lens for LED street lamp installed directly in front of the LED light source (6) is provided. The lens' inner lateral surface, which is close to the LED light source (6), is an internally recessed horizontal cylindrical surface (1). The lens' outer lateral surface, which is distant from the LED light source (6), is a longitudinal cylindrical surface (2). At the middle position of the longitudinal cylindrical surface (2), two internally recessed oblique cylindrical surfaces (3) are provided respectively at two sides of the longitudinal cylindrical surface (2). Both sides of the horizontal cylindrical surface (1) are processed to form mounting planes (4) for jointing and positioning. Both ends of the lens are provided with internally recessed arc, triangular, square or trapezoidal clamping grooves (5) for installation and fixation. The light emitted from the LED light source (6) is expanded in two directions perpendicular to each other through the horizontal cylindrical surface (1) and the longitudinal cylindrical surface (2). Due to the existence of the oblique cylindrical surfaces (3) located at the middle position, the lens can reduce luminous flux of the middle position, and finally form uniform dumbbell-shaped light spot, so that the light passing through the lens can be distributed more uniformly and the length to width ratio of the light spot can be increased, thus meeting the requirements of street lamp in use.

Description

LED street light lens

Technical field

The invention belongs to the field of LED applications, and in particular relates to an LED street lamp lens. Background technique

It is well known that the light emitted by the LED light source must be integrated under the lens to achieve the desired spot shape and soft brightness. There are two types of lens devices that have been announced. One is to add a convex lens to the front end of the LED light source to integrate the light tube. The lens produced by this lens is circular and is not suitable for street lamps; the other is to deform the convex lens. Change to a semi-cylindrical or half peanut shell. The ratio of the length of the spot to the height of the pole is basically 2.5:1, which can be applied to the main road with a height of 8-10 meters and a street lamp pole spacing of about 30 meters, while the main road lights are tall and high. Meters, the distance between the poles is more than 40 meters, and the published lenses are difficult to apply. The "horse stool" and the lens disclosed in the present invention can effectively solve the above problems.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an LED street light lens which allows LED light passing through a lens to form a dumbbell shaped spot on a road having a ratio of the length of the spot to the height of the light pole of 4:1 or more.

The object of the invention is achieved by the following technical solutions:

An LED street light lens is installed directly in front of the LED light source, and the lens is disposed adjacent to the inner side of the LED light source as a concave lateral cylindrical surface, and both sides of the horizontal cylindrical surface are processed into a mounting plane, and the plane is used for fitting and positioning The outer side of the lens away from the LED light source is a longitudinal cylindrical surface, and two concave inclined cylinders are disposed at an intermediate position of the longitudinal cylindrical surface, the two inclined cylindrical surfaces are separated on both sides of the longitudinal cylindrical surface; There are card slots on both sides for mounting and fixing, and the card positions are concave curved, triangular, square or trapezoidal.

The light emitted from the LED light source is directed in two directions perpendicular to each other through the lateral cylindrical surface and the longitudinal cylindrical surface Divergence, further due to the presence of the intermediate inclined cylinder, will reduce the luminous flux at the intermediate position, and at the same time increase the luminous flux at both ends due to its reflection, eventually forming a dumbbell-shaped spot that is evenly hooked, making the light distribution after passing through the lens more uniform , increasing the ratio of the length to the width of the spot, and improving the uniformity of light on the illuminated surface. DRAWINGS

The invention will now be described in further detail with reference to the drawings and embodiments.

1 is a front elevational view of an LED street light lens according to an embodiment of the present invention;

2 is a perspective view of an LED street light lens according to an embodiment of the present invention;

Figure 3 is a plan view;

Figure 4 is a side view.

In the picture:

1. Transverse cylinder surface; 2. Longitudinal cylinder surface; 3. Inclined cylinder surface; 4. Plane; 5. Card slot; 6. LED light source. detailed description

As shown in FIG. 1 - 4, the LED street lamp lens of the present invention is installed directly in front of the LED light source 6. The lens is disposed adjacent to the inner side of the LED light source 6 as a concave lateral cylindrical surface 1 and two transverse cylindrical surfaces 1 The side is processed into a plane 4, the plane 4 is used for fitting and positioning; the outer side of the lens away from the LED light source 6 is a longitudinal cylinder 2, and two concave inclined cylinders are arranged at an intermediate position of the longitudinal cylinder 2 3, the two inclined cylindrical faces 3 are separated from the two sides of the longitudinal cylindrical surface 2; the overall shape is a "horse stool", and a card slot 5 is provided at both ends of the lens for mounting and fixing, the card slot 5 It is concave, curved, triangular, or trapezoidal.

The light emitted from the LED light source is diverged in two directions perpendicular to each other by the lateral cylindrical surface 1 and the longitudinal cylindrical surface 2, and further, due to the presence of the intermediate inclined cylindrical surface 3, the luminous flux at the intermediate position is reduced. At the same time, due to its reflection effect, the luminous flux at both ends is increased, and finally a dumbbell-shaped spot of the hook is formed, so that the light distribution after passing through the lens is more evenly hooked, the ratio of the length to the width of the spot is increased, and the uniformity of the light on the illumination surface is improved. Degree, can meet the requirements of street lamps.

Claims

1. An LED street light lens mounted directly in front of the LED light source, wherein the lens is disposed adjacent to the inner side of the LED light source as a concave lateral cylindrical surface, and the outer side of the lens away from the LED light source is a longitudinal cylindrical surface, in the longitudinal direction The intermediate position of the cylinder is provided with two concave inclined cylinders, the two inclined cylinders being separated from the two sides of the cylinder.

The LED street lamp lens according to claim 1, wherein both sides of the lateral cylinder are machined into a mounting plane.

The LED street lamp lens according to claim 1, wherein a card slot is provided at both ends of the lens, and the card slot is curved, triangular, square or trapezoidal inside.